生成四位编码replicate

DECLARE @MaxCode CHAR(4)
SELECT @MaxCode = MAX(a.Code) FROM dbo.jd_DeptPlanTaskCompile a LEFT JOIN dbo.jd_DeptPlanCompile b ON a.PlanID = b.ID WHERE a.Level = 1 AND a.PlanID = ‘299A02A8-8D4F-E411-80EF-00155D0A6F04‘
IF @MaxCode IS NULL OR @MaxCode = ‘‘
BEGIN
 SET @MaxCode = ‘0000‘
END
SELECT REPLICATE(‘0‘,4 -LEN(CAST ((CAST (@MaxCode AS INTEGER) + 1) AS VARCHAR))) + CAST ((CAST (@MaxCode AS INTEGER) + 1) AS VARCHAR)